解决：
把这段加到web.config文件的assemblyBinding节点下
<
configuration
>
< runtime >
< assemblyBinding xmlns ="urn:schemas-microsoft-com:asm.v1" >
< dependentAssembly >
< assemblyIdentity name ="WebGrease" publicKeyToken ="31bf3856ad364e35" culture ="neutral" />
< bindingRedirect oldVersion ="0.0.0.0-1.3.0.0" newVersion ="1.3.0.0" />
</ dependentAssembly >
</ assemblyBinding >
</ runtime >
</ configuration >
< runtime >
< assemblyBinding xmlns ="urn:schemas-microsoft-com:asm.v1" >
< dependentAssembly >
< assemblyIdentity name ="WebGrease" publicKeyToken ="31bf3856ad364e35" culture ="neutral" />
< bindingRedirect oldVersion ="0.0.0.0-1.3.0.0" newVersion ="1.3.0.0" />
</ dependentAssembly >
</ assemblyBinding >
</ runtime >
</ configuration >
本文转自火地晋博客园博客，原文链接：http://www.cnblogs.com/yelaiju/archive/2013/04/17/3025875.html，如需转载请自行联系原作者
